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""An early ether vaporizer designed by John Snow. A Treasure of the Wood Library-Museum of Anesthesiology.""

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(March 1992)The History of Anesthesia. Third International Symposium, Proceedings (March 1992): 91-99

PDF posted with permission from the Wood Library-Museum, Schaumburg IL (USA).

At the time, it appeared that the apparatus at the WL-M was "the single surviving Snow vaporizer" (99). In 2009, however, Connor and Zuck determined that the Royal Society of Medicine (UK) owned a similar model.

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